US2653834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated pipe union
Assignee: Individual
•
Filing: 1950-09-21
•
Granted: 1953-09-29
•
Expires: 1970-09-21
Abstract
No abstract record available.
Inventors
- 👤 Roy C Purkhiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/026; F16B; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10T; Y10T403/00; Y10T403/45
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US373452A
Cited
US426121A
Cited
US626143A
Cited
US689455A
Cited
US1983228A
Cited
US2148036A
Cited
US2234119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |